The former Bath forward appeared to lead with his forearm in a 52nd-minute challenge on Gloucester lock Mariano Galarza, who required a lengthy spell of treatment on the pitch before going off.

"I am disappointed with the outcome," Hogg said.

"I think the red card changed the outcome of the game. I was very proud of the endeavour and effort of the players, but it makes it difficult when you are down to 14.

"I need to review it (red card incident). I didn't get a real proper look at it, but obviously it has altered the outcome of the game.

"Once we got a foothold in the game our scrum in particular was outstanding. We looked strong going in at half-time, but with 14 players, it's very difficult.

"You could see the collective effort and spirit and we have got to challenge ourselves to be more accurate in certain areas of the field.

"I thought we were in a good place in the game. We were starting to turn the game in our favour, but it's all hypothetical. The red card changes the outcome of the game.

"I think it was determined by the TMO (television match official). I wasn't privy to the communication that went between the referee and the TMO."

Gloucester scored tries after Faosiliva departed through centre Matt Scott and wing Henry Purdy, but they remain without a league win at Worcester since 2010 after touchdowns from England squad centre Ben Te'o, who went off at half-time after complaining of feeling dizzy, wing Cooper Vuna and substitute Perry Humphreys for the Warriors.

Ex-Gloucester fly-half Ryan Lamb added a penalty and conversion and Tom Heathcote also kicked a penalty, while Greig Laidlaw kicked three penalties for the visitors and two conversions - but worryingly for Gloucester, they have already conceded eight tries this season.

Gloucester rugby director David Humphreys said: "We are obviously disappointed, given the context of the game, to only come away with two points.

"But at the same time at 20-9 down after the way we lost the game (against Leicester) last week, it would have been easy for the players to feel a bit sorry for themselves.

"But we showed some real composure and played some very good rugby, and we gave ourselves a couple of opportunities in the last four or five minutes that we should have taken to win the game."

Regarding Galarza and flanker Ross Moriarty both going off following heavy collisions, Humphreys added: "They are both up and about. It is nothing too serious, but they will now undergo the return to play protocols."

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